Discontinued Operations - Schedule of Results of Discontinued Operation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Dec. 25, 2015
Operating expenses:
Income (loss) from discontinued operations before income taxes	$ (722)	$ (4,077)	$ (7,406)
Income tax expense	(261)	40	(225)
Net loss from discontinued operations	(461)	(4,117)	(7,181)
Kingston, New York Facility
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net sales		26,576	80,748
Cost of sales		28,077	80,840
Operating expenses:
Research and development		262	954
Selling, general, and administrative	722	2,315	2,765
Amortization of intangible assets			475
Total operating expenses	722	2,577	4,194
Operating income (loss)	(722)	(4,078)	(4,286)
Interest income, net			(16)
Other expense, net		(1)	3,136
Income (loss) from discontinued operations before income taxes	(722)	(4,077)	(7,406)
Income tax expense	(261)	40	(225)
Net loss from discontinued operations	$ (461)	$ (4,117)	$ (7,181)